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I'm going off of memory from the last dyno run which is always a
dangerous thing - memory, not the dyno.
Our 1300 is prepped to SCCA HP limited prep rules - 11:1 compression,
Kastner A8 cam, Sunoco 110 leaded fuel. We made initial pulls at 36
degrees and then played around a bit. We made slightly more power by
advancing up to 42 degrees but we all agreed (engine builder, dyno
operator and me) that backing back down into the 30's in the interest of
engine reliability made sense. I think we ended up at 38, but it may
have been 36. Guess I ought to check, but then the engine is out of the
car right now.
BTW, in my opinion, chassis dyno time with an experienced operator is
the cheapest horsepower and best assurance that your timing and A/F
mixture is set right.
Jim
On 6/2/2015 6:05 PM, Bud R wrote:
> Thanks for all the comments on timing.
>
> The source of the 48 timing number indicated that was a typo and they
> meant 38 degrees total advance and going down from there until no
> detonation. Sorry about that.
>
> I was just curious as Kas? spitfire competition manual says 32 max or
> there will be detonation. Which is where I have it set now with no
> detonation.
>
> The car is going on the dyno on Tuesday so hopefully once the carb
> (DCOE 40) is dialed in we will get the timing to where the engine
> likes it best.
>
> Thanks
> Bud
>
>
>
> Extreme Parts Racing (more than just a haircut)
>
> 71TR6 CC57365 (Good 6)
> 71 Spitfire MK IV Race Car #3
> 69 Spitfire MK III (back up FE engine/dinghy car)
> 93 Minnie Winnie Race Support Vehicle
> 77 Z-50A Hardly Davidson Honda Mini-Trail Bike (Triumph Pit Bike)
>
>
>
>
>
>
>
>
>
>
>
>
> On Jun 2, 2015, at 11:57 AM, Bud Rolofson <levilevi@comcast.net
>
>> Amici,
>>
>> What timing setting are you Spitfire racers using? I've seen
>> suggestions from 32 degrees total advance to 48.
>> Thanks
>> Bud
>>
>> Sent from Vail pass 10881 ft elevation. Will be back home in a couple
>> hours from our Utah National Park tour in the RV.
>>
>>
>> Sent from my Commodore 64
>
>
>
> _______________________________________________
> fot@autox.team.net
>
> http://www.fot-racing.com
>
> Donate: http://www.team.net/donate.html
> Archive: http://www.team.net/archive
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> Unsubscribe/Manage:
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>
>
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I'm going off of memory from the last dyno run which is always a
dangerous thing - memory, not the dyno.<br>
<br>
Our 1300 is prepped to SCCA HP limited prep rules - 11:1
compression, Kastner A8 cam, Sunoco 110 leaded fuel. We made
initial pulls at 36 degrees and then played around a bit. We made
slightly more power by advancing up to 42 degrees but we all agreed
(engine builder, dyno operator and me) that backing back down into
the 30's in the interest of engine reliability made sense. I think
we ended up at 38, but it may have been 36. Guess I ought to check,
but then the engine is out of the car right now.<br>
<br>
BTW, in my opinion, chassis dyno time with an experienced operator
is the cheapest horsepower and best assurance that your timing and
A/F mixture is set right. <br>
<br>
Jim<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">On 6/2/2015 6:05 PM, Bud R wrote:<br>
</div>
<blockquote
cite="mid:CE2CEE09-9D61-42AE-B54A-BCEFE8D96167@comcast.net"
type="cite">
<meta http-equiv="Content-Type" content="text/html;
charset=windows-1252">
<div>Thanks for all the comments on timing.</div>
<div><br>
</div>
The source of the 48 timing number indicated that was a typo and
they meant 38 degrees total advance and going down from there
until no detonation. Sorry about that.
<div><br>
</div>
<div>I was just curious as Kas? spitfire competition manual says
32 max or there will be detonation. Which is where I have it set
now with no detonation.</div>
<div><br>
</div>
<div>The car is going on the dyno on Tuesday so hopefully once the
carb (DCOE 40) is dialed in we will get the timing to where the
engine likes it best.</div>
<div><br>
</div>
<div>Thanks</div>
<div>Bud<br>
<div apple-content-edited="true">
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style="orphans: 2; text-align: -webkit-auto;
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after-white-space;"><span
class="Apple-style-span" style="orphans: 2;
text-align: -webkit-auto; text-indent: 0px;
widows: 2;
-webkit-text-decorations-in-effect: none;">
<div style="word-wrap: break-word;
-webkit-nbsp-mode: space;
-webkit-line-break: after-white-space;"><span
class="Apple-style-span" style="orphans:
2; text-align: -webkit-auto;
text-indent: 0px; widows: 2;
-webkit-text-decorations-in-effect:
none;">
<div style="word-wrap: break-word;
-webkit-nbsp-mode: space;
-webkit-line-break:
after-white-space;"><span
class="Apple-style-span"
style="orphans: 2; text-indent: 0px;
widows: 2;
-webkit-text-decorations-in-effect:
none;">
<div style="word-wrap: break-word;
-webkit-nbsp-mode: space;
-webkit-line-break:
after-white-space;"><span
class="Apple-style-span"
style="orphans: 2; text-indent:
0px; widows: 2;
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none;">
<div>
<div style="border-collapse:
separate; color: rgb(0, 0,
0); font-family: Helvetica;
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text-transform: none;
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0px;"><br
class="Apple-interchange-newline">
<br>
</div>
<div style="border-collapse:
separate; color: rgb(0, 0,
0); font-family: Helvetica;
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letter-spacing: normal;
line-height: normal;
text-transform: none;
white-space: normal;
word-spacing: 0px;
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0px;"><br>
</div>
<div style="border-collapse:
separate; color: rgb(0, 0,
0); font-family: Helvetica;
font-style: normal;
font-variant: normal;
font-weight: normal;
letter-spacing: normal;
line-height: normal;
text-transform: none;
white-space: normal;
word-spacing: 0px;
border-spacing: 0px;
-webkit-text-stroke-width:
0px;">Extreme Parts
Racing (more than just a
haircut)</div>
<div style="border-collapse:
separate; color: rgb(0, 0,
0); font-family: Helvetica;
font-style: normal;
font-variant: normal;
font-weight: normal;
letter-spacing: normal;
line-height: normal;
text-transform: none;
white-space: normal;
word-spacing: 0px;
border-spacing: 0px;
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0px;"><br>
</div>
<div>71TR6 CC57365 (Good 6)</div>
<div style="border-collapse:
separate; color: rgb(0, 0,
0); font-family: Helvetica;
font-style: normal;
font-variant: normal;
font-weight: normal;
letter-spacing: normal;
line-height: normal;
text-transform: none;
white-space: normal;
word-spacing: 0px;
border-spacing: 0px;
-webkit-text-stroke-width:
0px;">71 Spitfire MK IV Race
Car #3</div>
<div style="border-collapse:
separate; color: rgb(0, 0,
0); font-family: Helvetica;
font-style: normal;
font-variant: normal;
font-weight: normal;
letter-spacing: normal;
line-height: normal;
text-transform: none;
white-space: normal;
word-spacing: 0px;
border-spacing: 0px;
-webkit-text-stroke-width:
0px;">69 Spitfire MK III
(back up FE engine/dinghy
car)</div>
<div style="border-collapse:
separate; color: rgb(0, 0,
0); font-family: Helvetica;
font-style: normal;
font-variant: normal;
font-weight: normal;
letter-spacing: normal;
line-height: normal;
text-transform: none;
white-space: normal;
word-spacing: 0px;
border-spacing: 0px;
-webkit-text-stroke-width:
0px;">93 Minnie Winnie Race
Support Vehicle </div>
<div style="border-collapse:
separate; color: rgb(0, 0,
0); font-family: Helvetica;
font-style: normal;
font-variant: normal;
font-weight: normal;
letter-spacing: normal;
line-height: normal;
text-transform: none;
white-space: normal;
word-spacing: 0px;
border-spacing: 0px;
-webkit-text-stroke-width:
0px;">77 Z-50A Hardly
Davidson Honda Mini-Trail
Bike (Triumph Pit Bike)</div>
</div>
<div style="border-collapse:
separate; color: rgb(0, 0, 0);
font-family: Helvetica;
font-size: 12px; font-style:
normal; font-variant: normal;
font-weight: normal;
letter-spacing: normal;
line-height: normal;
text-transform: none;
white-space: normal;
word-spacing: 0px;
border-spacing: 0px;
-webkit-text-stroke-width:
0px;"><br>
</div>
<div style="border-collapse:
separate; color: rgb(0, 0, 0);
font-family: Helvetica;
font-size: 12px; font-style:
normal; font-variant: normal;
font-weight: normal;
letter-spacing: normal;
line-height: normal;
text-transform: none;
white-space: normal;
word-spacing: 0px;
border-spacing: 0px;
-webkit-text-stroke-width:
0px;"><br>
</div>
</span><br
class="Apple-interchange-newline">
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class="Apple-interchange-newline">
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class="Apple-interchange-newline">
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rgb(0, 0, 0); font-family: Helvetica; font-size: 18px;
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orphans: auto; text-align: start; text-indent: 0px;
text-transform: none; white-space: normal; widows: auto;
word-spacing: 0px; -webkit-text-stroke-width: 0px;">
<br class="Apple-interchange-newline">
</div>
<br>
<div>
<div>On Jun 2, 2015, at 11:57 AM, Bud Rolofson <<a
moz-do-not-send="true"
href="mailto:levilevi@comcast.net";>levilevi@comcast.net</a>>
wrote:</div>
<br class="Apple-interchange-newline">
<blockquote type="cite">Amici,<br>
<br>
What timing setting are you Spitfire racers using? I've seen
suggestions from 32 degrees total advance to 48. <br>
Thanks<br>
Bud<br>
<br>
Sent from Vail pass 10881 ft elevation. Will be back home in
a couple hours from our Utah National Park tour in the RV.<br>
<br>
<br>
Sent from my Commodore 64</blockquote>
</div>
<br>
</div>
<br>
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<pre wrap="">_______________________________________________
<a class="moz-txt-link-abbreviated"
href="mailto:fot@autox.team.net";>fot@autox.team.net</a>
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href="http://www.fot-racing.com";>http://www.fot-racing.com</a>
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